code: def test_same(self):
      assert metrics.mape(self.series1 + 1, self.series1 + 1) == 0
      assert metrics.smape(self.series1 + 1, self.series1 + 1) == 0
      assert (
          metrics.mase(
              self.series1 + 1, self.series1 + 1, self.series_train, 1
          )
          == 0
      )
      assert metrics.marre(self.series1 + 1, self.series1 + 1) == 0
      assert metrics.r2_score(self.series1 + 1, self.series1 + 1) == 1
      assert metrics.ope(self.series1 + 1, self.series1 + 1) == 0
      assert (
          metrics.rho_risk(
              self.series1 + 1, self.series11_stochastic + 1
          )
          == 0
      )
  
imports: import numpy
  import pandas
  import pytest
  from darts import TimeSeries
  from darts.metrics import metrics
label_desc: Use image node_id 2 for calling the TestMetrics obj's underlying member method code with example usage: obj.test_same() without return types